50 years on, UK marks mine disaster that killed 128 children

FILE - In this Oct. 22, 1966 file photo, rescue workers shovel the wet coal waste 28 hours after it slipped down the man-made mountain of coal waste and engulfed the Pantglas Junior School, and some houses, in Aberfan, Wales. Fifty years ago on Friday Oct. 21, 2016, an avalanche of mine waste swept down on a Welsh village and killed 116 children and 28 adults. Britain recalls the disaster that led to tougher rules on safety and fed a distrust of government that continues to this day. (AP Photo/File) (The Associated Press)

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FILE - This Thursday Oct. 13, 2016 file photo shows the memorial garden dedicated to the victims of the Aberfan disaster that was built on the site of Pantglas Junior School in Aberfan Wales, as the 50th anniversary of the tragedy approaches. Fifty years ago on Friday Oct. 21, 1966, an avalanche of mine waste swept down on a Welsh village and killed 116 children and 28 adults. Britain recalls the disaster that led to tougher rules on safety and fed a distrust of government that continues to this day (Steve Parsons/PA File via AP) (The Associated Press)

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FILE - In this Oct. 22, 1966 file photo, rescue workers shovel the wet coal waste 28 hours after it slipped down the man-made mountain of coal waste and engulfed the Pantglas Junior School, and some houses, in Aberfan, Wales. Fifty years ago on Friday Oct. 21, 2016, an avalanche of mine waste swept down on a Welsh village and killed 116 children and 28 adults. Britain recalls the disaster that led to tougher rules on safety and fed a distrust of government that continues to this day. (AP Photo/File) (The Associated Press)

LONDON – People across Britain fell silent to mark 50 years since a mountain of coal sludge collapsed onto a Welsh village, killing more than 140 people in one of the country's worst mining disasters.